Resolver terminal attachment structure

ABSTRACT

A resolver terminal attachment structure for a resolver including a stator core constructed from multiple laminated plates providing multiple stationary magnetic poles with attendant stationary magnetic pole teeth that protrude in a direction that faces the center of a stator yoke, the magnetic poles adapted to accept a stator winding, includes a lead wire fixture, which electrically couples the stator winding to a lead wire via attachment pins, and two protrusions mechanically coupled at the outside of the stator core for supporting the lead wire fixture therebetween.

BACKGROUND OF THE INVENTION

[0001] The present invention relates generally to a rotating machine.More specifically, the present invention relates to structure forattaching terminals to the stator of a rotating machine, e.g., aresolver.

[0002] The present invention claims priority from Japanese PatentApplication No. 2002-101179, which was filed on Apr. 3, 2002, and whichis incorporated herein by reference for all purposes.

[0003] Resolvers have been employed in myriad systems where, forexample, rotation position detection is required. One known class ofresolver is the variable reluctance resolver. In the variable reluctanceresolver 500 depicted in FIGS. 5 and 6, multiple magnetic poles 3protrude from a circular yoke 2 on to which poles a stator winding (notshown) is wound. It will be appreciated that the stator accommodates andreceives a rotor (also not shown), as discussed below. See alsocopending, commonly-assigned U.S. patent application Ser. No.2002/0063491 A1 to Kobayashi et al., which claims priority from JapanesePatent No. JP02002171737A.

[0004] Still referring to both FIGS. 5 and 6, a stator assembly 520 of atypical variable reluctance resolver 500 is formed by using a firststator magnetic pole assembly 55, which is provided with a componentattachment portion 57, and a second stator magnetic pole assembly 56,which assemblies flank respective sides of the circular stator core 1.As discussed below, the core 1 consists of a stack of soft metallicmagnetic plates, e.g., plates 1 a-1 n.

[0005] In FIG. 5, both ends of the stator core 1 are flanked, andconsequently the stator core assembly 520 including the first statormagnetic pole assembly 55, and the second stator magnetic pole assembly56, are enclosed by a synthetic resin 201 in such a way that thesurfaces of the magnetic pole teeth 4 of the stator core 1, i.e., theteeth that face a rotor (not shown), are left exposed. The insideportions of the stationary magnetic pole teeth 4 of the stator core 1are such that they oppose the outside surface of the rotor (not shown)when the rotor is disposed in the interior of the stator assembly 520.

[0006] The first stator magnetic pole assembly 55 and the second statormagnetic pole assembly 56 are joined by the synthetic resin 201, whichis forced through multiple through holes 203 provided in the stator core1. The synthetic resin 201 forms a uniform circular surface with theinside portions of the stationary magnetic pole teeth 4, which portionsare not covered by the synthetic resin 201. In addition, the syntheticresin 201 also partially, if not fully, saturates the windings of thestator assembly 520 in which the stator winding (not shown) is disposed,and secures the stator magnetic pole assemblies 55, 56 to the statorcore 1. Multiple stator magnetic pole assembly fixing holes 203 areprovided, which pass through the stator core 1 proximate to the outerperiphery of the stator magnetic pole assemblies 55, 56 permitsaturation of the stator core 1 by the synthetic resin 201.

[0007] The first stator magnetic pole assembly 55 has a structure inwhich a component attachment portion 57 is provided, while the secondstator magnetic pole assembly 56 lacks a component attachment portion57. The interior of the component attachment portion 57 is not coveredby the synthetic resin 201; a potting material 400 is injected to plugup the exposed portions. A lead wire or lead wire bundle 204 is drawnout from the component attachment portion 57 into which the pottingmaterial 400 has been injected; the lead wire bundle is such that it canbe externally connected to a wiring harness (not shown).

[0008]FIG. 6 is an exploded view of the stator assembly 520 shown inFIG. 5. Multiple stator magnetic pole assembly fixing holes 203 providedin the stator core 1 pass through the stator core 1, which is formed bya laminated stack of steel plates 1 a- 1 n. The synthetic resin 201penetrates the stator magnetic pole assembly fixing holes 203 andcontacts the first stator magnetic pole assembly 55 and the secondstator magnetic pole assembly 56 to secure them to the stator core 1.The synthetic resin 201 consists of a material that has a coefficient ofthermal expansion of 0.00003/cm/cm/° C., such as PBT glass (30%). Thefirst stator magnetic pole assembly 55 and the second stator magneticpole assembly 56 each consist of a material that has a coefficient ofthermal expansion of 0.00003/cm/cm/° C., such as PBT glass (30%). Itwill be noted that a coil winding portion 510, which has the same shapeand quantity of protrusions as the stationary magnetic pole portion 3and the magnetic pole teeth 4 of the yoke 2, is provided on each of thestator magnetic pole assemblies 55, 56.

[0009] Thus, the first stator magnetic pole assembly 55, the laminatedstator core 1, and second stator magnetic pole assembly 56, are stackedsuch that the stationary magnetic pole teeth 4 provided on thestationary magnetic pole portion 3 of the stator core 1 and the coilwinding portions 510 of the first and second stator magnetic poleassemblies 55, 56 are aligned with one another.

[0010] In addition to the fastening function provided by the throughholes 203 and synthetic resin 201, two component attachment portionfixing holes 401 c and 401 d are provided in and pass through thelaminated stator core 1. When encapsulating the first stator magneticpole assembly 55 and the second stator magnetic pole assembly 56 with asynthetic resin 201, the synthetic resin 201 passes through additional(and adjacently positioned) through holes 401 a and 401 b, which areprovided in the component attachment portion 57, to further secure thecomponent attachment portion 57 to the stator core 1.

[0011] As mentioned above, a stator winding (not shown) is wound aroundthe coil winding, e.g., magnetic poles 3, of the stator assembly 520assembled as described above using a predetermined winding pattern, andthe ends of the windings are connected to attachment pins (also notshown) associated with the component attachment portion 57 and securedto the first stator magnetic pole assembly 55 and second stator magneticpole assembly 56. Then the stator assembly 520 is enclosed with thesynthetic resin 201. The component attachment portion 57 is such thatthe potting material 400 (see FIG. 5), which has a coefficient ofthermal expansion of 0.000046/cm/cm/° C., such as epoxy resin, isinjected to plug up the exposed portions, e.g., the attachment pins.

[0012] Analysis of this assembly method reveals the following problems.Specifically, in the draw-out structure of a conventional lead wire, thestructure is such that after the stator winding is wound, the ends ofthe winding are connected to attachment pins (not shown) of thecomponent attachment portion 57, and the lead wire is drawn out to theexterior of the stator assembly 520. The component attachment portion 57becomes an integral structure with the first stator magnetic poleassembly 55, which is formed of resin. For this reason, when an externalforce is applied to the component attachment portion 57, there are caseswhere the component attachment portion 57 ruptures at its boundary withthe first stator magnetic pole assembly 55. In addition, when anexternal force is applied to the component attachment portion 57, anexternal force is also applied to the stator winding that is wound onthe coil winding portions 510 of the final stator assembly 520, since itis an integral unit with the first stator magnetic pole assembly 55.Given that external force, there are cases where the windings short, andresolver reliability decreases. In addition, when the first statormagnetic pole assembly 55 becomes an integral structure with thecomponent attachment portion 57, its structure becomes complex.Moreover, the shapes of the first and second magnetic pole assemblies55, 56 differ from one another. Since there is a need to use statormagnetic pole assemblies that have respectively different shapes, it isdifficult to reduce resolver prices.

[0013] What is needed is a resolver terminal attachment structure thatis highly reliable. Moreover, what is needed is a resolver terminalattachment structure that permits construction of a low cost resolver.

SUMMARY OF THE INVENTION

[0014] Based on the above and foregoing, it can be appreciated thatthere presently exists a need in the art for a resolver terminalattachment structure that overcomes the above-described deficiencies.The present invention was motivated by a desire to overcome thedrawbacks and shortcomings of the presently available technology, andthereby fulfill this need in the art.

[0015] According to one aspect, the present invention provides aterminal attachment structure for electrically coupling a rotatingmachine, having a stator core constructed from multiple laminated platesproviding multiple stationary magnetic poles with attendant stationarymagnetic pole teeth that protrude in a direction that faces the centerof the stator core, to a lead wire. Preferably, the terminal attachmentstructure includes first and second members protruding outwardly, e.g.,radially, from the stator core, and a lead wire fixture having first andsecond plates separated by first and second legs mechanically coupled toone another to form a unitary structure adapted to engage with the firstand second members, where a plurality of wire accepting pins penetrateat least one of the first and second plates. If desired, the terminalattachment structure may also include N fastening mechanisms, where thefirst and second members include N through holes, each of the first andsecond plates include N through holes, and the lead wire fixture iscoupled to first and second members by the N fastening mechanismspassing through respective ones of the N through holes in the firstplate, the N through holes in the first and second members, and the Nthrough holes in the second plate. It will be noted that N can be anyinteger greater than 1.

[0016] In an exemplary case, the first and second plates contactopposing sides of the first and second members. When the thickness ofthe stator core is a predetermined thickness, the thickness of the leadwire fixture can be greater than or equal to that predeterminedthickness. Preferably, the at least one of the first and second platesof the lead wire fixture are formed from a synthetic resin having apredetermined coefficient of thermal expansion. In an exemplary case, afemale receptacle extends the gap formed by the first and second plateswith the first and second legs parallel to the first and second members.In that case, the receptacle, which is adapted to accept a mating maleplug, supports wire-accepting pins bent at a predetermined angle.Preferably, a first end of each of the wire-accepting pins penetratesthe first plate, while a second end of each of the wire-accepting pinsis disposed in the receptacle.

[0017] According to another aspect, the present invention provides aresolver terminal attachment structure for a resolver including a statorcore constructed from multiple laminated plates providing multiplestationary magnetic poles with attendant stationary magnetic pole teeththat protrude in a direction that faces the center of a stator yoke, themagnetic poles adapted to accept a stator winding, including a lead wirefixture, which electrically couples the stator winding to a lead wirevia attachment pins, and two protrusions mechanically coupled at theoutside of the stator core for supporting the lead wire fixturetherebetween.

[0018] According to yet another aspect, the present invention provides alead wire fixture for electrically coupling a rotating machine, having astator core constructed from multiple laminated plates forming first andsecond members protruding outwardly, e.g., radially, from the statorcore, to a lead wire. The lead wire fixture includes first and secondplates disposed parallel to one another, first and second legs disposedat a predetermined angle with respect to one another, each of the firstand second legs being fixedly coupled to both the first and secondplates, and a plurality of wire accepting pins penetrating at least oneof the first and second plates. In an exemplary case, at least one endof each of the wire-accepting pins is disposed substantiallyperpendicular to the first plate, and the first and second plates andthe first and second legs form a unitary structure adapted to engagewith the first and second members.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and various other features and aspects of the presentinvention will be readily understood with reference to the followingdetailed description taken in conjunction with the accompanyingdrawings, in which like or similar numbers are used throughout, and inwhich:

[0020] FIGS. 1(a), 1(b), 1(c), and 1(d) collectively depicts a statorfrom various angles that explains the resolver terminal attachmentstructure in an exemplary embodiment of the present invention, whereFIG. 1(a) is a top view, FIG. 1(b) is a front view, and FIGS. 1(c) and1(d) are alternative cross-sectional views taken along the 1(c)-1(c)line of FIG. 1(a). It will be noted that FIG. 1(d) is an embodiment thatmakes the outer circumference edge portion and the protrusionillustrated in FIG. 1(c) the same thickness as the inner circumference,

[0021] FIGS. 2(a), 2(b), and 2(c) collectively illustrate an exemplaryembodiment of the lead wire fixture, where FIG. 2(a) is a top view, FIG.2(b) is a front view, and FIG. 2(c) is a right side surface view;

[0022] FIGS. 3(a), 3(b), and 3(c) collectively illustrate anotherexemplary embodiment of the lead wire fixture, where FIG. 3(a) is a topview, FIG. 3(b) is a front view, and FIG. 3(c) is a right side surfaceview, while FIGS. 3(d) and 3(e) are drawings that show an embodiment ofa structure that provides a connector socket integral with the wire leadfixture illustrated in FIGS. 3(a)-3(c);

[0023] FIGS. 4(a) and 4(b) collectively illustrate the manner in whichthe lead wire fixture is attached to the stator in accordance with thepresent invention, where FIG. 4(a) is a top view, and FIG. 4(b) is afront view;

[0024]FIG. 5 is an external perspective view of a conventional statorassembly in a variable reluctance resolver; and

[0025]FIG. 6 is an exploded view of a conventional stator assembly inthe resolver depicted in FIG. 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] A resolver terminal attachment structure according to the presentinvention provides a lead wire fixing device, hereinafter simply a leadwire fixture, in a rotating machine, e.g., a resolver including a statorcore constructed from multiple laminated plate-shaped bodies providingmultiple stationary magnetic poles with attendant stationary magneticpole teeth that protrude in a direction that faces the center of astator yoke. The lead wire fixture, which connects a stator winding thatis wound on the stationary magnetic pole teeth of the stator core to alead wire, engages with two protrusions at the outside of the statorcore. The lead wire fixture supports attachment pins that secure atleast one of the stator winding and a lead wire, which pins are providedin a standing manner.

[0027] It will be appreciated that in the resolver terminal attachmentstructure described above, through holes advantageously can berespectively formed in the two protrusions provided at the outside ofthe stator core and in the lead wire fixture, and the lead wire fixturecan be secured to the stator core by at least one fixing device thatpasses through selected ones of the through holes. If desired, the leadwire fixture may have a flange that engages with the two protrusionsprovided at the outside of the stator core.

[0028]FIG. 1 is a drawing that explains the resolver terminal attachmentstructure according to the present invention, where FIG. 1(a) is a topview, FIG. 1(b) is a front view, and FIG. 1(c) is a cross-sectional viewat the 1(c)-1(c) line of FIG. 1(a). FIG. 1(d) illustrates an alternativeembodiment that makes the outer circumference edge portion and theprotrusion in FIG. 1(c) the same thickness as the inner circumference,which may also be employed in the present invention. In FIGS. 1(a)-1(d),portions that are identical to those of the stator core 1 shown in FIG.6 are assigned the same numbers, and, thus, a detailed explanation ofthese items will not be repeated.

[0029] In FIG. 1(a), multiple stationary magnetic poles 3 equipped withstationary magnetic pole teeth 4 protrude in the direction facing thecenter of the yoke 2, i.e., into the center of the stator core 1, whiletwo additional protrusions 2 a and 2 b, are disposed on and protrudefrom the outside of the stator core 1. In an exemplary case, the statorcore 1 is formed from multiple laminated plate-shaped bodies, e.g.,plates 1 a-1 n. Through holes generally denoted 5, e.g., holes 5 a, 5 b,5 c, and 5 d, which are employed to secure the lead wire fixture 6 (seethe discussion of FIGS. 2(a)-2(c) and FIGS. 3(a)-3(e) below) are formedin the protrusions 2 a and 2 b. During assembly, the through holes 5 andthe through holes formed in the lead wire fixture 6 (discussed below)formed at positions corresponding thereto are aligned, screws or pins100 are inserted, and the stator core 1 and the lead wire fixture 6 arefurther secured by any suitable method, e.g., gluing or caulking.

[0030] It will be appreciated that when the two protrusions 2 a and 2 bare manufactured by a process such as die cutting the yoke 2, theprotrusions are formed simultaneously with the multiple stationarymagnetic pole teeth 4, it is possible to reduce manufacturing costs. Inaddition, since these protrusion are an integral part of the structureof the yoke 2, the strength with respect to external forces applied tothe two protrusions 2 a and 2 b is high, minimizing the possibilities ofruptures in the resolver structure occurring in the vicinity of the twoprotrusions 2 a and 2 b.

[0031] FIGS. 2(a)-2(c) collectively illustrate an exemplary embodimentof the lead wire fixture 6 according to the present invention, whereFIG. 2(a) is a top view, FIG. 2(b) is a front view, and FIG. 2(c) is aright side surface view, respectively. The lead wire fixture 6advantageously can be formed from a synthetic resin material, e.g., PBTglass (30%), that has a coefficient of thermal expansion ofapproximately 0.00003/cm/cm/° C. As best seen in FIG. 2(b), plates 10 aand 10 b, each of which includes flanges 61 a and 61 b formed onopposite ends, join with upper and lower surfaces (not shown) of therotation axis direction (the R direction in FIG. 1(a)) of the twoprotrusions 2 a and 2 b. Advantageously, the lead wire fixture 6includes through holes 6 a, 6 b, 6 c and 6 d, which are formed in theflange 61 a, and through holes 6 f, 6 g, 6 h, and an unnumbered singlethrough hole (not shown in any of the drawings), which are respectivelyformed in the flange 61 b. It will be appreciated that the through holesof the flanges 61 a and 61 b are respectively formed at positions thatalign from top to bottom, as illustrated in FIG. 2(b). It will also beappreciated that legs 62 a and 62 b are disposed perpendicular to theplates 10 a and 10 b, thus forming a gap 8 bounded by the flanges 61 aand 61 b and the legs 62 a and 62 b.

[0032] It will be appreciated that while the legs 62 a and 62 b areillustrated as being parallel to one another, the lead wire fixtureaccording to one aspect of the present invention is not so limited. Theprojection of the legs 62 a, 62 b advantageously can intersect with oneanother, i.e., the legs form an acute angle with respect to one another.This configuration will be particularly useful when the two protrusions2 a, 2 b radiate from the stator core 1 rather than project from thestator core while being disposed parallel to one another. Othervariations will occur to one of ordinary skill in the art after readingthe present disclosure, and all such variations are considered to bewithin the scope of the present invention.

[0033] In the region where the gap 8 defined by the plates 10 a and 10 bis formed, multiple pins generally denoted 7, e.g., 7 a, 7 b, 7 c, 7 d,7 e and 7 f, that are employed to secure the stator winding, penetrateboth of the plates 10 a and 10 b. When the two protrusions 2 a and 2 bprovided at the outside of the stator core 1 are fit into recessedportions 9 a and 9 b formed by legs 62 a and 62 b and the plates 10 aand 10 b, the through holes 6 a, 6 b, 6 c, 6 d, 6 f, 6 g, and 6 h, andthe unnumbered through hole provided in the flange 61 a and flange 61 bcorrespond with the through holes generally denoted 5, e.g., holes 5 a,5 b, 5 c, and 5 d, provided in the protrusions 2 a and 2 b. A statorwinding (not shown) advantageously can be wound around pins provided ina standing manner at the plate 10 a side, and the lead wire can be woundaround pins provided in a standing manner at the plate 10 b side.

[0034] FIGS. 3(a)-3(e) collectively illustrate an alternative embodimentof the lead wire fixture 6′ according to the present invention. Morespecifically, FIG. 3(a) is a top view, FIG. 3(b) is a front view, andFIG. 3(c) is a right side surface view, respectively, of the lead wirefixture 6′. One of the differences between the lead wire fixturesillustrated in FIGS. 2 and 3 lies in the fact that multiple pinsgenerally denoted 7′, e.g., pins 7 a′, 7 b′, 7 c′, 7 d′, 7 e′, and 7 f′,that either the stator winding or lead wire are wound around areprovided in such a manner that they pass through only one of the plates10 a, 10 b, e.g., plate 10 a. Specifically, each of the multiple pins 7′is bent approximately 90 degrees in the Y direction (shown in FIG. 1(a))in the gap 8 formed between the flanges 61 a and 61 b, and it comes outfrom the lead wire fixture 6′ to the exterior. A stator winding (notshown) is wound around pins provided in a standing manner with respectto the plate 10 a. In that case, the lead wire is wound around pins thatare bent approximately 90 degrees in the Y direction (see FIG. 1(a)).

[0035] Alternatively, the lead wire advantageously may be fit into thegap 8 without being wound around the pins 7′, i.e., the pins that arebent approximately 90 degrees, while a socket that is equipped with pinsthat respectively engage with the lead wire may be provided in the gap8. The lead wire may also be connected to pins provided in the socket.In this case, the socket and the lead wire fixture 6 are separated, andthe degree of freedom of the assembly increases. In addition, as shownin FIGS. 3(d) and 3(e), a structure that provides a connector socket 11,e.g., a female receptacle, as a unitary element with plates 10 a and 10b can also be employed.

[0036] FIGS. 4(a) and 4(b) collectively illustrate the stator 1 afterthe lead wire fixture 6, 6′ according to the present invention has beenattached to the stator 1. More specifically, FIG. 4(a) is a top view,and FIG. 4(b) is a front view. Note that the pins generally denoted 7,e.g., pins 7 a, 7 b, 7 c, 7 d, 7 e, and 7 f, are not shown in FIG. 4.When the two protrusions 2 a and 2 b provided at the outside of thestator core 1 engage with the recessed portions 9 a, 9 b of the leadwire fixture 6, the insides of the two protrusions 2 a and 2 b come intocontact with the outsides of the legs 62 a and 62 c, while the interiorsof the flanges 61 a and 61 b join with both surfaces (taken in the Rdirection illustrated in FIG. 1(a)) of the two protrusions 2 a and 2 b.As a result, movement of the lead wire fixture 6 in the R direction ofthe stator core 1, which motion would result in separation of thewindings from the lead wires in a conventional resolver core, isprevented. In addition, at this time, the through holes formed onflanges 61 a and 61 b and protrusions 2 a and 2 b are aligned, allowingthe lead wire fixture 6 to be secured to the stator core 1 by fasteningmechanisms, e.g., screws or pins through inserted in the through holes.It will be appreciated that other fastening mechanisms, e.g., rivets,advantageously can be employed and that all such mechanisms areconsidered to be within the scope of the present invention.

[0037] Thus, the lead wire is drawn out from the lead wire fixture 6 inthis way. Moreover, the stator assembly 520 is completed by enclosing acommonly known stator magnetic pole assembly, such as that shown in FIG.6, from both side surfaces of the stator core 1. It will be appreciatedthat the stator magnetic pole assembly advantageously can be formed by asynthetic resin, e.g., PBT glass (30%), that has a coefficient ofthermal expansion of 0.00003/cm/cm/° C. Moreover, a coil winding portionof the stator core 1 is provided that has the same shape and quantity ofprotrusions as the stationary magnetic poles 3 with their respectivemagnetic pole teeth 4.

[0038] Through the resolver terminal attachment structure of the presentinvention, the lead wire fixture 6 can be attached to the stator core 1while being separated from the stator magnetic pole assemblies. For thisreason, even if an external force were applied to the lead wire fixture6, the stator core 1, which is formed from strong, silicon steel plates,prevents rupturing of the lead wire fixture 6. In addition, even if anexternal force was applied to the lead wire fixture 6 but not to thestator winding, i.e., a sheer force is applied, shorting of the windingwould be prevented. As a result, resolver reliability improves.

[0039] Moreover, the structure of the stator magnetic pole assemblies issimplified by employing a structure in which the lead wire fixture 6 isattached to the stator core 1, and in which the stator magnetic poleassemblies, which are enclosed from both sides of the stator core 1, areidentical in shape. In short, it is not necessary to use stator magneticpole assemblies with respectively different shapes. Thus, the resolverprice advantageously can be reduced. Furthermore, in addition to it notbeing necessary to fill the interior of the lead wire fixture 6 withpotting material, it is possible to increase the creeping distance withrespect to the stator core 1 by virtue of plates 10 a and 10 b andflanges 61 a and 61 b of the lead wire fixture 6 and, as a result, theinsulation voltage resistance improves.

[0040] A resolver terminal attachment structure according to the presentinvention advantageously can be included in a resolver provided with astator core constructed from multiple laminated plate-shaped bodiesincluding multiple stationary magnetic poles equipped with stationarymagnetic pole teeth, which protrude in the direction facing the centerof a yoke. The resolver terminal attachment structure includes a leadwire fixture that connects a stator winding, which is wound on thestationary magnetic pole teeth of the stator core, to a lead wirerouting signals and power between the lead wire and the statorwinding(s). Preferably, the resolver terminal attachment structureprovides two protrusions at the outside of the stator core, whichprotrusions accommodate and support the lead wire fixture. Mostpreferably, the lead wire fixture supports attachment pins, on which thestator winding and a lead wire are wound, which pins penetrate at leastone face of the lead wire fixture.

[0041] In an exemplary case, through holes are respectively formed inthe two protrusions provided at the outside of the stator core and inthe lead wire fixture, which holes permit the lead wire fixture to besecured to the stator core by a fixing mechanism that passes throughpredetermined ones of the through holes. If desired, the lead wirefixture advantageously can have a flange that engages with the twoprotrusions provided at the outside of the stator core.

[0042] It will be appreciated that other configurations of the lead wirefixture advantageously can be employed in the resolver terminalattachment structure without departing from the present invention. Forexample, while the legs 62 a, 62 b separating the plates 10 a, 10 b areillustrated as being displaced from the ends of the plates 10 a, 10 b,the legs advantageously can be moved to the ends of the plates oradditional pairs of legs can be provided at the ends of the plates.Moreover, while the present invention is described with respect to anexemplary resolver, the invention is not so limited. The terminalattachment structure according to the present invention can be adaptedto any rotating machinery employing a stator or stator core.

[0043] Although presently preferred embodiments of the present inventionhave been described in detail herein, it should be clearly understoodthat many variations and/or modifications of the basic inventiveconcepts herein taught, which may appear to those skilled in thepertinent art, will still fall within the spirit and scope of thepresent invention, as defined in the appended claims.

What is claimed is:
 1. A resolver terminal attachment structure for aresolver including a stator core constructed from multiple laminatedplates providing multiple stationary magnetic poles with attendantstationary magnetic pole teeth that protrude in a direction that facesthe center of a stator yoke, the magnetic poles adapted to accept astator winding, comprising: a lead wire fixture, which electricallycouples the stator winding to a lead wire; and two protrusionsmechanically coupled at the outside of the stator core for supportingthe lead wire fixture therebetween.
 2. The resolver terminal attachmentstructure as recited in claim 1, wherein: through holes are formed inthe two protrusions and in the lead wire fixture; and the lead wirefixture is secured to the stator core by at least one fixing device thatpasses through selected ones of the through holes.
 3. The resolverterminal attachment structure as recited in claim 3, wherein the leadwire fixture further comprises at least one flange that engages with thetwo protrusions.
 4. A terminal attachment structure for electricallycoupling a rotating machine, having a stator core constructed frommultiple laminated plates providing multiple stationary magnetic poleswith attendant stationary magnetic pole teeth that protrude in adirection that faces the center of the stator core, to a lead wire,comprising: first and second members protruding outwardly from thestator core; and a lead wire fixture having first and second platesseparated by first and second legs mechanically coupled to one anotherto form a unitary structure adapted to engage with the first and secondmembers, wherein a plurality of wire accepting pins penetrate at leastone of the first and second plates.
 5. The terminal attachment structureas recited in claim 4, further comprising N fastening mechanisms,wherein: the first and second members include N through holes; each ofthe first and second plates include N through holes; and the lead wirefixture is coupled to first and second members by the N fasteningmechanisms passing through respective ones of the N through holes in thefirst plate, the N through holes in the first and second members, andthe N through holes in the second plate, where N is an integer greaterthan
 1. 6. The terminal attachment structure as recited in claim 4,wherein the first and second plates contact opposing sides of the firstand second members.
 7. The terminal attachment structure as recited inclaim 4, wherein: the stator core further comprises multiple steelplates providing a stator core with a predetermined thickness; and thethickness of the lead wire fixture is greater than the predeterminedthickness.
 8. The terminal attachment structure as recited in claim 4,wherein the first and second plates of the lead wire fixture comprise asynthetic resin having a predetermined coefficient of thermal expansion.9. The terminal attachment structure as recited in claim 4, furthercomprising a female receptacle extending the gap formed by the first andsecond plates with the first and second legs parallel to the first andsecond members, the receptacle adapted to accept a mating male plug,wherein: the wire-accepting pins are bent at a predetermined angle; afirst end of each of the wire-accepting pins penetrate the first plate;a second end of each of the wire-accepting pins is disposed in thereceptacle.
 10. A lead wire fixture for electrically coupling a rotatingmachine (500), having a stator core constructed from multiple laminatedplates forming first and second members protruding outwardly from thestator core, to a lead wire, comprising: first and second platesdisposed parallel to one another; first and second legs disposed at apredetermined angle with respect to one another, each of the first andsecond legs being fixedly coupled to both the first and second plates;and a plurality of wire accepting pins penetrating at least one of thefirst and second plates, wherein: at least one end of each of thewire-accepting pins is disposed substantially perpendicular to the firstplate; and the first and second plates and the first and second legsform a unitary structure adapted to engage with the first and secondmembers.
 11. The lead wire fixture as recited in claim 10, wherein: thefirst and second members include N through holes; each of the first andsecond plates include N through holes; the lead wire fixture is coupledto first and second members by N fastening mechanisms passing throughrespective ones of the N through holes in the first plate, the N throughholes in the first and second members, and the N through holes in thesecond plate; and N is a positive integer.
 12. The lead wire fixture asrecited in claim 10, wherein the first and second plates contactopposing sides of the first and second members.
 13. The lead wirefixture as recited in claim 10, wherein the first and second plates ofthe lead wire fixture comprise a synthetic resin having a predeterminedcoefficient of thermal expansion.
 14. The lead wire fixture as recitedin claim 10, further comprising a female receptacle extending the gapformed by the first and second plates with-the first and second legsparallel to the first and second members, the receptacle adapted toaccept a mating male plug, wherein: the wire-accepting pins are bent ata predetermined angle; the at least one end of each of thewire-accepting pins penetrates the first plate; a second end of each ofthe wire-accepting pins is disposed in the receptacle.